Protist ID please

Images made through a microscope. All subject types.

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Olympusman
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Joined: Sun Jan 15, 2012 12:31 pm

Protist ID please

Post by Olympusman »

I've never seen these before from this specific pond. The pond is in na small township park fed by an adjacent stream, so the water turnover is quite rapid.
Protist One.jpg
Protist Two.jpg
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

Bruce Taylor
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Location: Wakefield, Quebec / Ottawa, Ontario
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Re: Protist ID please

Post by Bruce Taylor »

Hi Michael. This is likely Holophrya ovum (=Prorodon viridis, in older sources), a rotund ciliate with algal endosymbionts. In the second image, we have a top view of the mouth with its surrounding basket of nematodesmata (stiff microtubular rods that support the cytostome). Here's a view of the same structure in H. ovum, from Foissner et al., 1994:
Holophrya ovum mouth.png
It Came from the Pond (Blog): http://www.itcamefromthepond.com/

Olympusman
Posts: 5090
Joined: Sun Jan 15, 2012 12:31 pm

Re: Protist ID please

Post by Olympusman »

Thanks for the ID.

Mike
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

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